<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>深海登录</title>
    <style>
        :root {
            --deep-blue: #0077BE;
            --ocean: #00B4D8;
            --wave: #90E0EF;
        }
        
        body {
            margin: 0;
            height: 100vh;
            background: linear-gradient(to bottom, #00008B, #000033);
            font-family: 'Arial', sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }
        
        .ocean-card {
            width: 350px;
            padding: 40px;
            background: rgba(0, 20, 60, 0.7);
            border-radius: 15px;
            box-shadow: 0 0 30px rgba(0, 180, 216, 0.3);
            backdrop-filter: blur(5px);
            border: 1px solid rgba(144, 224, 239, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .ocean-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 10px;
            background: linear-gradient(to right, transparent, var(--wave), transparent);
            animation: wave 3s linear infinite;
        }
        
        @keyframes wave {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }
        
        h2 {
            color: var(--wave);
            text-align: center;
            margin-bottom: 30px;
            text-shadow: 0 0 10px rgba(0, 180, 216, 0.5);
        }
        
        .input-group {
            position: relative;
            margin-bottom: 30px;
        }
        
        input {
            box-sizing: border-box;
            width: 100%;
            padding: 15px;
            background: rgba(0, 40, 80, 0.5);
            border: 1px solid var(--ocean);
            border-radius: 8px;
            color: white;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        input:focus {
            outline: none;
            border-color: var(--wave);
            box-shadow: 0 0 15px rgba(144, 224, 239, 0.5);
        }
        
        label {
            position: absolute;
            left: 15px;
            top: 15px;
            color: var(--ocean);
            transition: all 0.3s;
            pointer-events: none;
        }
        
        input:focus ~ label,
        input:valid ~ label {
            top: -10px;
            left: 10px;
            font-size: 12px;
            color: var(--wave);
            background: rgba(0, 20, 60, 0.9);
            padding: 0 5px;
        }
        
        .ocean-btn {
            width: 100%;
            padding: 15px;
            background: linear-gradient(to right, var(--deep-blue), var(--ocean));
            border: none;
            border-radius: 8px;
            color: white;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        .ocean-btn:hover {
            background: linear-gradient(to right, var(--ocean), var(--wave));
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 180, 216, 0.4);
        }
        
        .bubble {
            position: absolute;
            background: rgba(144, 224, 239, 0.3);
            border-radius: 50%;
            animation: bubbleUp 10s linear infinite;
        }
        
        @keyframes bubbleUp {
            0% { 
                transform: translateY(0) scale(0.5);
                opacity: 0;
            }
            10% { opacity: 0.5; }
            90% { opacity: 0.5; }
            100% { 
                transform: translateY(-100vh) scale(1.5);
                opacity: 0;
            }
        }
    </style>
</head>
<body>
    <div id="bubbles"></div>
    
    <div class="ocean-card">
        <h2>深海探索</h2>
        <div class="input-group">
            <input type="text" id="ocean-user" required>
            <label for="ocean-user">潜水员ID</label>
        </div>
        <div class="input-group">
            <input type="password" id="ocean-pass" required>
            <label for="ocean-pass">安全密码</label>
        </div>
        <button class="ocean-btn">开始探索</button>
    </div>

    <script>
        // 创建气泡效果
        const bubblesContainer = document.getElementById('bubbles');
        for (let i = 0; i < 20; i++) {
            const bubble = document.createElement('div');
            bubble.classList.add('bubble');
            const size = 5 + Math.random() * 15;
            bubble.style.width = `${size}px`;
            bubble.style.height = `${size}px`;
            bubble.style.left = `${Math.random() * 100}%`;
            bubble.style.bottom = `${-10 - Math.random() * 20}px`;
            bubble.style.animationDuration = `${5 + Math.random() * 15}s`;
            bubble.style.animationDelay = `${Math.random() * 5}s`;
            bubblesContainer.appendChild(bubble);
        }
    </script>
</body>
</html>